Good game. a bit too hard for me for the final boss, but I don't usually like bullet hell games. I get the final boss to 1/3 health left before I die. Maybe an extra upgrade to purchase might help, but that's up to you.
For reference, my favorite newground schmup are protostar and this one i remember being called 'renegade or rebel' ( but I can't find it on newgrounds again. . . you play a ship that defects or leaves a federation and explores the space systems and sees how oppressive the federation is before returning with new allies to take the federation down).